In the tense summer of 1935, Dr. Watson’s medical practice is interrupted by an unexpected visitor: Mycroft Holmes, bearing a request from Nazi Germany. A minor official accuses a high-ranking Luftwaffe administrator, Erhard Milch, of Jewish ancestry—a claim that could prove fatal under the Nuremberg Laws. Mycroft and Watson embark on a clandestine investigation to uncover the truth, navigating a web of racial obsession, bureaucratic cynicism, and startling pragmatism at the highest levels of the Third Reich. In a world where identity is a matter of life and death, the duo must decide where justice—and realpolitik—truly lie.